Two things on this.
1) Fox rarely mentions the race sponsor UNLESS the race sponsor also pays them. The race sponsor generally only has a deal with the track/promoter. Fox has done this for about a decade at least.
EDITED TO ADD - In fact sometimes they take money from a DIFFERENT sponsor and call the race by THAT sponsor's name on the air. That is pretty egregious, but it has been done in the past.
2) the November race at Texas is generally the AAA 500, so it _could_ have just been a mistake. I am not sure I would lay odds on it being an oversight... but if they were going to omit the NRA they would probably just call it the Texas 500. So maybe a mistake.